Self-adjoint sub-classes of third and fourth-order evolution equations. - Igor Leite Freire (Appl. Math. Comput., 2011)

On the Lane-Emden system in dimension one. - Yuri Bozhkov; Igor Leite Freire (Appl. Math. Comput., 2012)

New classes of nonlinearly self-adjoint evolution equations of third- and fifth-order. - Igor Leite Freire (Commun. Nonlinear Sci. Numer. Simul., 2013)

On the nonlinear self-adjointness and local conservation laws for a class of evolution equations unifying many models. - Igor Leite Freire; Júlio Cesar Santos Sampaio (Commun. Nonlinear Sci. Numer. Simul., 2014)

Similarity solutions for systems arising from an Aedes aegypti model. - Igor Leite Freire; Mariano Torrisi (Commun. Nonlinear Sci. Numer. Simul., 2014)

Corrigendum to "On the nonlinear self-adjointness and local conservation laws for a class of evolution equations unifying many models" [Communications in Nonlinear Science and Numerical Simulation 19(2) (2014) 350-360]. - Igor Leite Freire; Júlio Cesar Santos Sampaio (Commun. Nonlinear Sci. Numer. Simul., 2016)

Nonlinear self-adjointness of a class of third order nonlinear dispersive equations. - Rita Tracinà; Igor Leite Freire; Mariano Torrisi (Commun. Nonlinear Sci. Numer. Simul., 2016)

Group analysis of a hyperbolic Lane-Emden system. - Tshepo E. Mogorosi; Igor Leite Freire; Ben Muatjetjeja; Chaudry Masood Khalique (Appl. Math. Comput., 2017)

Study of a fifth order PDE using symmetries. - Stylianos Dimas; Igor Leite Freire (Appl. Math. Lett., 2017)

Genealogical index: A metric to analyze advisor-advisee relationships. - Luciano Rossi; Igor Leite Freire; Jesús P. Mena-Chalco (J. Informetrics, 2017)

Topological metrics in academic genealogy graphs. - Luciano Rossi; Rafael J. P. Damaceno; Igor Leite Freire; Etelvino J. H. Bechara; Jesús P. Mena-Chalco (J. Informetrics, 2018)

Structural and qualitative properties of a geometrically integrable equation. - Nazime Sales Filho; Igor Leite Freire (Commun. Nonlinear Sci. Numer. Simul., 2022)

Remarks on strong global solutions of the b-equation. - Igor Leite Freire (Appl. Math. Lett., 2023)

Local Isometric Immersions and Breakdown of Manifolds Determined by Cauchy Problems of the Degasperis-Procesi Equation. - Igor Leite Freire (J. Nonlinear Sci., 2025)